Bruno schmidt



BRU'NO'SCHMI'DT, OF HOBOK EN, NEW JERSEY.

nater'zwm No. 76,824, dated April 14,1858.

IMPROVEMENT IN RESTORING OLD LEATHER.

@132 irlgehule reitmt tn in this 3mm iatlitfll mitt matiug'part if the semi.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, BRUNO SGlIMIDT, of Hoboke'n, in the county of Hudson, in the State ofNew Jersey, have invented anew and useful Improvement in Restoring Leather; and I'dohereby deolare the following "to be a full, clear, and exactdescriptiori thereof, which will enable those skilled in the art to make and use v the same.

The object of this invention is to restore old leather, which has become useless or dead by long use, or by the action of fats and other causes; so that snch'old leather,.by being subjected to vmy" process, obtains again all the qualitiesof new leather, and becomes fit for renewed use.

'In order to efl'ect this pnrpose,'I s,ubject the old leather to the action of steam, whereby it becomes soft and pliable. The leather is then cleaned, from the dirt and impurities adhering to it, by suitable scrapers, and,

after having been cleaned, it is introduced into a bathof tepid water-containing a small quantity of soda', where it remains for two or three hours, After having been removed from this'ba'th, the leather is again. subjected to a scraping process, so as to remove all the remaining dirtand impurities, and'then it'is introduced into a concentrated tepid solution of oak bark, or other-material containing an abundance of tannin, where it remains for twenty-four hours,

By these means the leather absorbsa fresh quantityof tannin, or,in other words, it undergoes a renewed tanning process, and; all the tannin whichmay have beenlost, bythe action oflfats orother impurities on the leather, is restored to it. v

When the leather has been removed from the tannin-solution, it is dried, and well rubbed with a mixture of tannin and fat,:an i it is ready for use. i

Old leather treated according to this invention is equal in strength and pliability to "new leather of the same quality. 7

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

The within-described process of restoring old leather, by subjecting the same to the various manipulations above set-forth.

BRUNO SCHMIDT.

Witnesses:

W. Hsurr, E. F. KASTENHUBER. 

